Planer-gage and calipers



(No Model.) 2 Sheets-Sheet I.

w. HADDOW.

, PLANER GAGE AND GALIPERS. N0. 380,797. Patented Apr. 10, 1888.

N. Ptrzns, Phnio-Lxlhognpher, Washington, 0. c,

No Mfidel. 2 Sheets-Shed 2.

W. HADDOW. PLANER GAGE AND G'ALIPERS.

No. 380,797. PatentedApr. 10, 1888.

Fig. 6.

NITED STATES PATENT OFFICE.

\VILLIAM HADDOl/V, OF N El/VTON, MASSACHUSETTS.

PLANER-GAGE AND CALIPERS.

SPECIFICATION forming part of Letters Patent No. 380,797, dated April10, 1888.

Application filed December 30, 1887. Serial No. 259,407. (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM HADDOW, a citizen of the United States,residing at Newton, in the county of Norfolk and State of Massachusetts,have invented certain new and useful Improvements in Planer-Gages andCalipers, of which the following is a specification.

My invention relates to improvements in planer-gages and calipers; andthe objects of I my invention are to provide a convenient tool for usein connection with planingmachines for setting the planer-tools, for aninside and outside calipers, fora depth-gage, scratch-gage, andsurface-gage, and in the efficiency of the device.

In the accompanying drawings, Figure l is a side elevation of myplaner-gage and calipers. Fig. 2 is a plan view of the same. Fig. 3 is afront elevation, partly in vertical section. Fig. 4 is a detached sideelevation of the setting-arm with a depth-gage attach ed, the latterbeing shown partly in vertical section. Fig. 5 is a front elevation ofsaid depth-gage; and Fig. 6 is an enlarged vertical section, partly inelevation, of a portion of my planergage, showing the manner of securingand adjusting the measuring-screw in the frame.

A designates the base or bed of the frame B.

O designates the measuring-screw, fitted against longitudinal movementwithin the upper end of the frame B and provided with an operatingbutton or cap, D. Upon the upper part of the frame A is an index-mark,a, Fig. 1, and on the periphery of the button D, near its base, arevertical marks which divide said periphery into twentyfive divisions.lhe screw 0 is threaded with forty threads to the inch, so that amovement of one division of the screw registers onethousandth of aninch, all substantially asin an ordinary micrometercalipers.

In order to compensate for wear, the split nut E upon the body of thescrew is adjusted laterally by a clamp-screw in the ordinary manner, andin order to adjust the screw 0 with reference to its length, so that itshall properly register with the under face of the 'base A, whichrepresents the zero-line, I provide the screw-threaded bushing q in theupper part of the frame, as shown in Fig.6, which general to improvebushing may be turned by a proper screwdriver inserted in the slot atits upper end, and when adjusted may be held in place by the set-screws, the operating-button being removed when it is desired to adjust themeas- Extendingin the opposite '60 attached to the setting-pointer F,while its other end rests in a slot in the measuring-arm 12, whereby thesetting-pointer F is held in position to register with the index-mark c7 Whenever said arm is not forced out of position.

An upright at the front end of the frame B has fixed upon it a scale,graduated to represent twenty-five thousandths of an inch, the figureson said scale designating the longer marks of said graduations, the samebeing every fourth graduation-mark, and consequently representing tenthsof an inch. As shown in the drawings, the scale 9 is to be read from theupper edge of the measuring-arm.

Within a slot at one edge of the base there is a swinging caliper-arm,G, pivoted to said base, which when not wanted for use is turned intothe position shown in the draw ings, and when wanted for use as acaliper-arm it is swung around to the front immediately opposite thesettingarm 6, broken lines in Fig. 1..

In Figs. 4 and 5 I have shown a depth-gage adapted for use upon the endof the settingarm 6. piece, h, adapted to fit the end of the settingarm6, as shown in Fig. 4, and a screw-pin, k, provided With a threadedneck, by which it is attached and detached to and from the lower end ofthe socket-piece. only one of these screw-pins; but, if desired, anumber of them of different lengths may be provided. I have illustrateda set-screw, m, for fastening the socket-piece it upon the setasindicated by ting-arm e;'but in practice I intend to fit the loosocket-piece to the setting-arm so accurately that it will stay in placeby friction, and

This depth-gage consists of a socket- I have illustrated therebydispense with the use of the setscrew m.

Upon that side of the split nut E which is opposite the measuring-arm bthere is a projecting screw, it, upon which is mounted the split clampH, for holding the scratch 0, and upon the outer end of said screw isthe thumb nut J,for holding the clamp H in position and binding it uponthe body of the scratch.

Supposing it were required to set the planertool one-half inch above agiven surface, the measuring-screw would be turned to bring the top ofthe measuring-arm b to the graduation represented by the figure 5 on thescale, and with the zero-mark on the operating-button D to register withthe index a, in which case the upper surface of the setting-arm 6 wouldbe just half an inch above the lower face of the base A. The base isthen set upon the surface to be gaged from, and the planer-tool isbrought down upon the top face of the settingarm e so as to contacttherewith, but still leave the pointer F directly upon the index 0. Itwill readily be seen that if the tool is brought down too far thepointer will be carried off from its index.

The depth-gage may be used for measuring a slot or hole, the pointerindicating whether or not the end of the screw-pin of the depthgage isin contact with the bottom of the slot or .hole, so that its depth maybe measured or the slot or hole sunk until it is of the required depth.

'With the caliper-arm G swung around so as to form a companion arm forthe setting-arm e, the device can be used for an inside or outsidecalipers. When used as an inside calipers, the measure registered ordesired may be read from the top of the measuring-arm b, and by makingthe vertical width of the measuringarm b at the point where it coversthe scale 9 equal to the sum of the widths vertically of the arms 6 andG the measure for an outside calipers maybe correctly read from theunder edge of the measuring-arm b. As illustrated in the drawings, thenutE would come in contact with the top of the base A as soon as thebottom of the measuring-arm b is in the same plane as the under face ofthe base A, and as said arm e is about one-eighth of an inch in heightthe tool as arranged must read from one-eighth of an inch upward. Ifdesired to have the upper face of the setting-arm e operate from thezero-line upward, it is only necessary to shorten the under side of thenut E or correspondingly lower the scale g and setting arm 6.

The operation of the scratch-gage will be readily understood. Byloosening and tightening the nut J the scratch may be adjusted to anydesired position, when it may be used for marking or measuring work, andby raising and lowering it with the measuring-screw it may be used forlaying out marks any desired distance apart.

I claim as my invention 1. The frame B, having base A, in combinationwith the measuring-screw O, the nut E, and the setting-arm e and pointerF, mounted on said nut, substantially as described, and for the purposespecified.

2. The combination of the frame B, having base A and scale 9, themeasuring-screw O, the nut E, measuring-arm b, registering wit-h thescale and having theindex 0, and the pointer F, pivotally mounted on abracket which extends from the nut E and provided with the settingarm 0,substantially as described, and for the purpose specified.

3. The combination of the measuring-screw and nut with the caliperarm G,setting-arm e, the pointer F, pivotally mounted, and the index-mark c onan arm extending from the nut E, substantially as described, and for thepurpose specified.

- 4. The combination of the measuring-screw and nut having an armcarrying the index 0, the pointer F, pivoted upon an extension of thenut and bearing the setting-arm-e, and the depth-gage fitted to the arm6, substantially as described, and for the purpose specified.

5. The combination of the frame B, having base A, the under face ofwhich represents the zero-line, the measuring-screw G, nut E, andbushing q, for regulating the endwise adjust ment of the screw 0,substantially as described, and for the purpose specified.

6. The combination of the measuring screw, the nut E, having the armwith index-mark c, the pointer pivoted upon an extension of said nut andhaving the setting-arm e, and a spring for holding the pointer to theindex-mark, substantially as described, and for the purpose specified.

WILLIAM HADDOW.

Witnesses:

H. P. RICHARDS, FRANK J. HOWELL.

